3″-150LB-RF Heavy Pattern 304SS Floating Ball Valve
Description
TECHNICAL DATA SHEET
3″-150LB-RF Heavy Pattern 304SS Floating Ball Valve
1. General Description
| Item | Description |
|---|---|
| Product Name | Stainless Steel Flanged Floating Ball Valve |
| Model | Q41F-150LB (Heavy Pattern) |
| Nominal Size | 3″ (DN80) |
| Pressure Rating | Class 150LB |
| Body Material | 304 Stainless Steel (ASTM A351 CF8 / SS304) |
| End Connection | Flanged |
| Construction | Floating ball, two-piece / side-entry |
| Bore Type | Full bore (full port) |
| Seat Seal Type | Soft seated (PTFE / RPTFE / PPL) |
| Fire Safe Design | Optional, to API 607 |
This 3-inch, Class 150LB stainless steel floating ball valve is of heavy pattern construction. The body is made of 304 stainless steel (CF8). Flange ends conform to ASME B16.5. Suitable for water, oil, gas and mildly corrosive media for on-off service.
2. Design & Manufacturing Standards
| Item | Standard |
|---|---|
| Design & Manufacture | ASME B16.34, API 6D, API 608 |
| Face-to-Face Dimensions | ASME B16.10 |
| Flanged Ends | ASME B16.5 |
| Butt Weld Ends | ASME B16.25 |
| Inspection & Testing | API 598 |
| Wall Thickness | ASME B16.34, GB12224 |
| Fire Test (optional) | API 607 |
| Anti-static | API 608 |
| Mounting Pad | ISO 5211 |
3. Main Technical Parameters
| Parameter | Value |
|---|---|
| Nominal Size (NPS) | 3″ (DN80) |
| Pressure Class | 150LB |
| Suitable Media | Water, oil, gas, mild corrosive fluids |
| Temperature Range | -20°C ~ +180°C (PTFE/RPTFE) |
| Max. Temperature (PPL seats) | -20°C ~ +300°C |
| Max. Working Pressure (ambient) | 1.96 MPa (285 psi) |
| Hydrostatic Shell Test Pressure | 1.5 × rating (~2.94 MPa) |
| Hydrostatic Seat Test Pressure | 1.1 × rating |
| Low Emission Test (optional) | ISO 15848 |
| Actuation | Manual (lever/gear) / pneumatic / electric |
| Flow Direction | Bidirectional |
| Operation | 90° quarter-turn |
4. Pressure-Temperature Ratings (ASME B16.34, Material Group 2.1)
| Temperature (°C) | Max. Working Pressure (MPa) |
|---|---|
| -29 ~ 38 | 1.96 |
| 93 | 1.78 |
| 121 | 1.62 |
| 149 | 1.50 |
| 177 | 1.42 |
| 204 | 1.35 |
| 232 | 1.30 |
| 260 | 1.26 |
| 288 | 1.22 |
| 316 | 1.18 |
| 343 | 1.15 |
| 371 | 1.12 |
| 399 | 1.09 |
| 427 | 1.06 |
Note: Ratings per ASME B16.34 for Material Group 2.1 (304 SS) for flanged end valves.
5. Dimensional Data
5.1 Face-to-Face & Overall Dimensions (mm)
| DN | NPS | L (Face-to-Face) | D (Flange OD) | C (Flange Thk.) | G (RF Dia.) | t (RF Height) | H (Height) | W (Lever Length) | n-φ (Bolt holes) |
|---|---|---|---|---|---|---|---|---|---|
| 80 | 3″ | 203 | 190 | 19 | 127 | 1.6 | 196 | 350 | 4-φ19 |
Dimensions per ASME B16.10 and B16.5.
5.2 Flange Connection Details (ASME B16.5 Class 150 RF)
| Parameter | Value (mm) |
|---|---|
| Flange OD (D) | 190.5 |
| Bolt circle dia. (D1) | 152.4 |
| Bolt hole dia. (d) | 19.1 (3/4″) |
| No. of bolt holes | 4 |
| Flange thickness (C) | 23.8 (including RF) |
| Sealing face | RF (raised face, height 1.6 mm) |
| Bolt size | 5/8″ (M16) |
5.3 Recommended Bolt Torque
| Bolt Size | Recommended Torque (N·m) |
|---|---|
| 5/8″ (M16) ASTM A193 Gr.B7 | 120 ~ 140 |
Note: Torque values are reference only. Adjust according to gasket type and service conditions.
6. Bill of Materials (Heavy Pattern / 304SS)
| No. | Part Name | ASTM Material | GB Material | Remarks |
|---|---|---|---|---|
| 1 | Body | A351 CF8 | 0Cr18Ni9 / 304 | Investment cast |
| 2 | Bonnet | A351 CF8 | 0Cr18Ni9 / 304 | Investment cast |
| 3 | Ball | 304 / 2Cr13 (plated) | 304 | Full bore |
| 4 | Seat Ring | PTFE / RPTFE / PPL | PTFE / RPTFE / PPL | Self-lubricating |
| 5 | Stem | SS304 | 2Cr13 / 304 | Blow-out proof |
| 6 | Stem Packing | PTFE / Graphite | PTFE / Flexible graphite | V-ring set |
| 7 | Body Gasket | PTFE / 304+Graphite spiral | PTFE / Spiral wound | |
| 8 | Bolts / Studs | A193 Gr.B8 (304) | 1Cr18Ni9Ti | Corrosion resistant |
| 9 | Nuts | A194 Gr.8 (304) | 1Cr18Ni9Ti | |
| 10 | Lever (manual) | Carbon steel / SS | Q235 / 304 | Lockable optional |
| 11 | Gland | A351 CF8 | 0Cr18Ni9 / 304 | |
| 12 | Anti-static device | SS / spring | SS304 / phosphor bronze | Per API 608 |
| 13 | Fire-safe seal (opt.) | Graphite | Expanded graphite | Per API 607 |
7. Construction Features
| Feature | Description |
|---|---|
| Floating ball design | Medium pressure pushes ball against downstream seat for tight shut-off |
| Full bore | Minimal flow resistance, equivalent to same length of pipe |
| Blow-out proof stem | Stem retained against internal pressure |
| Anti-static device | Conductive path between ball and stem to prevent static buildup (API 608) |
| ISO 5211 mounting pad | Direct mounting of pneumatic/electric actuators |
| Fire-safe option | Graphite secondary seal to API 607 |
| Seat material | PTFE/RPTFE/PPL – self-lubricating, corrosion resistant, tight sealing |
| 90° operation | Quick quarter-turn from fully open to fully closed |
8. Inspection & Testing (API 598)
| Test | Pressure | Hold Time | Acceptance |
|---|---|---|---|
| Shell hydrostatic | 1.5 × rating (~2.94 MPa) | ≥3 min | No leakage or visible deformation |
| High pressure seat (water) | 1.1 × rating (~2.16 MPa) | ≥3 min | No visible leakage |
| Low pressure seat (air) | 0.5 ~ 0.7 MPa | ≥1 min | No leakage across seat |
| Anti-static test | Per API 608 | — | Resistance ≤ 10 Ω |
Optional tests:
-
ISO 15848 low emission
-
API 607 fire test
-
NDT per ASME B16.34
9. Operating Torque (Reference)
For soft-seated floating ball valve, clean medium at ambient temperature.
| Condition | Break-to-Open (N·m) | Break-to-Close (N·m) |
|---|---|---|
| Ambient, no pressure (PTFE seats) | 40 ~ 50 | 40 ~ 50 |
| Ambient, 1.0 MPa | 55 ~ 70 | 55 ~ 70 |
| Ambient, 1.96 MPa (max rating) | 70 ~ 85 | 70 ~ 85 |
| High temperature (>150°C) | +20% ~ +30% | +20% ~ +30% |
| Low temperature (<0°C) | +15% ~ +25% | +15% ~ +25% |
Important: These values are for reference. For actuator sizing, multiply by a safety factor of 1.3 ~ 1.5.
10. Flow Coefficient (Cv) – Full Bore
| NPS | Cv (typical, full port) |
|---|---|
| 3″ | 400 ~ 500 |
Note: Cv = US gal/min of 60°F water at 1 psi pressure drop. Exact value depends on ball port diameter.
11. Service Conditions & Media
| Industry | Typical Media |
|---|---|
| Petrochemical | Crude oil, refined products, natural gas, LPG |
| Water treatment | Clean water, sewage, reclaimed water |
| Food & beverage | Food grade media (with food grade seals) |
| Pharmaceutical | Process water, drug solutions (with sanitary finish) |
| General industry | Compressed air, steam, thermal oil |
Limitations for 304 SS body:
-
Not suitable for strong oxidizing media (e.g. concentrated nitric or sulfuric acid – use 316/316L)
-
Avoid high chloride concentrations (risk of stress corrosion cracking)
-
For >200°C, use PPL seats or metal seated design
12. Weight & Packaging
| Item | Value |
|---|---|
| Approx. net weight | 12 ~ 15 kg |
| Packaging | Export wooden case / standard export packing |
| Protection | Plastic flange protectors, rust preventive coating |
13. Installation & Maintenance Notes
-
Pre-installation check: Verify valve size, material, pressure rating match line requirements. Clean pipe interior to avoid damaging sealing surfaces.
-
Flange connection: Use gasket conforming to ASME B16.5 (e.g. spiral wound or PTFE). Tighten bolts evenly in a cross pattern to avoid flange misalignment.
-
Operation: Handle parallel to pipe = open; perpendicular = closed. Do not use extension levers or impact tools.
-
Temperature effect: PTFE/RPTFE seats may expand at high temperature, increasing torque. Allow margin in actuator sizing.
-
Maintenance: Inspect operation and sealing every 6 months. For valves idle for long periods, cycle the valve periodically to prevent seat adhesion.
14. Ordering Information
Please specify the following when ordering:
-
Size (NPS/DN) and pressure class
-
Body material (304/316/WCB etc.)
-
Seat/seal material (PTFE/RPTFE/PPL/metal)
-
End connection type & standard (ASME/DIN/JIS)
-
Actuation (manual lever/gear/pneumatic/electric)
-
Fire safe required? (API 607)
-
Anti-static device required?
-
Medium, operating temperature & pressure
-
Special requirements (ISO 15848 low emission, NDT, etc.)
Manufacturer Information (to be filled)
| Item | Description |
|---|---|
| Product | 3″-150LB-RF Heavy Pattern 304SS Floating Ball Valve |
| Model | Q41F-150LB Heavy Pattern |
| Issue Date | April 14, 2026 |
| Version | V1.0 |
Disclaimer: This technical data sheet is prepared based on ASME B16.34, API 6D, API 598 and other industry standards. Actual product parameters are subject to the nameplate and factory test report. For special service conditions, please consult the manufacturer’s engineering department.
